== sanity test 255a: check 'lfs ladvise -a willread' ===== 21:18:00 (1708827480)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 1.94909 s, 53.8 MB/s
ladvise: range [2, 1] is invalid
Provide servers with advice about access patterns for a file.
usage: ladvise [--advice|-a ADVICE] [--start|-s START[kMGT]]
               [--background|-b] [--unset|-u]

               {--end|-e END[kMGT]|--length|-l LENGTH[kMGT]}
               {[--mode|-m [READ,WRITE]}
               <file> ...

ladvise: range [2, 2] is invalid
Provide servers with advice about access patterns for a file.
usage: ladvise [--advice|-a ADVICE] [--start|-s START[kMGT]]
               [--background|-b] [--unset|-u]

               {--end|-e END[kMGT]|--length|-l LENGTH[kMGT]}
               {[--mode|-m [READ,WRITE]}
               <file> ...

ladvise: conflicting arguments of -l and -e
Provide servers with advice about access patterns for a file.
usage: ladvise [--advice|-a ADVICE] [--start|-s START[kMGT]]
               [--background|-b] [--unset|-u]

               {--end|-e END[kMGT]|--length|-l LENGTH[kMGT]}
               {[--mode|-m [READ,WRITE]}
               <file> ...

Synchronous ladvise should wait
fail_val=8
fail_loc=0x237
Asynchronous ladvise shouldn't wait
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.95303
Iter 1/10: OSS cache speed: 2.47776
Iter 1/10: ladvise speed: 2.34733
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.36418
Iter 2/10: OSS cache speed: 2.51779
Iter 2/10: ladvise speed: 2.65832
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.51343
Iter 3/10: OSS cache speed: 2.50628
Iter 3/10: ladvise speed: 2.73546
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.45239
Iter 4/10: OSS cache speed: 2.47313
Iter 4/10: ladvise speed: 2.54739
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.83029
Iter 5/10: OSS cache speed: 2.57129
Iter 5/10: ladvise speed: 2.55636
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.6444
Iter 6/10: OSS cache speed: 2.55839
Iter 6/10: ladvise speed: 2.63886
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.55112
Iter 7/10: OSS cache speed: 2.58962
Iter 7/10: ladvise speed: 2.6467
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.48293
Iter 8/10: OSS cache speed: 2.5058
Iter 8/10: ladvise speed: 2.58583
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 3.03501
Iter 9/10: OSS cache speed: 2.81323
Iter 9/10: ladvise speed: 2.92117
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.91136
Iter 10/10: OSS cache speed: 2.67851
Iter 10/10: ladvise speed: 2.55015
Average uncached read: 2.67
Average speedup with OSS cached read: 2.56 = +-4.11%
Average speedup with ladvise willread: 2.61 = +-2.24%
Speedup with OSS cached read less than 20%, got -4.11%. Skipping ladvise willread check.
fail_loc=0